Holy Franz I understand where you are coming from, however I honestly don't think another MCAT is prudent especially if your practice scores are not leaps and bounds ahead of your current score.
Like Holy Franz has said in previous posts the classes, especially the med classes, are time consuming and require your undivided attention.
Physio and anatomy are on par with rigorous undergrad advanced Bio classes however they don't seem so tough because of the amount of free time to devote to them. I believe that it would be very easy to neglect the grad courses while studying for the MCAT and hurt your GPA which could raise red flags.
The take home message is: If you are accepted into the program, your stats are good enough to get you into the school. I see no reason to stress yourself out preparing for another MCAT. Just do your best in the classes.
The classes are time consuming however please remember if you devote adequate time to your studies YOU WILL DO FINE!!!
Welcome to all that have been accepted and good luck to those still waiting ( I didn't get in until july 17)
Please don't hesitate to ask Holy Franz or I any further questions